public static String getLocalHostIp()

in impl/src/main/java/org/apache/rocketmq/remoting/internal/NetworkUtils.java [52:80]

27 lines of code
13 McCabe index (conditional complexity)


    public static String getLocalHostIp() {
        try {
            for (Enumeration<NetworkInterface> ifaces = NetworkInterface.getNetworkInterfaces(); ifaces.hasMoreElements(); ) {
                NetworkInterface iface = ifaces.nextElement();
                // Workaround for docker0 bridge
                if ("docker0".equals(iface.getName()) || !iface.isUp()) {
                    continue;
                }
                InetAddress ia;
                for (Enumeration<InetAddress> ips = iface.getInetAddresses(); ips.hasMoreElements(); ) {
                    ia = ips.nextElement();
                    if (ia instanceof Inet4Address) {
                        // Check if the address is any local or loop back(127.0.0.1 or ::1)
                        if (!ia.isLoopbackAddress() && ia.getHostAddress().indexOf(':') == -1) {
                            if (ia.isSiteLocalAddress()) {
                                return ia.getHostAddress();
                            } else if (!ia.isLinkLocalAddress() && !ia.isAnyLocalAddress()
                                && !ia.isMulticastAddress()) {
                                return ia.getHostAddress();
                            }
                        }
                    }
                }
            }
        } catch (SocketException e) {
            throw new RuntimeException("Could not get local host ip", e);
        }
        return DEFAULT_LOCAL_ADDRESS;
    }